R/H axis suddenly disappeared

Dave Horsfall <[email protected]>
Newsgroups gmane.comp.graphics.gnuplot.user
Message-ID <[email protected]>
Gnuplot 5.4 patchlevel 1 on MacBook Pro Sierra 10.12.6 (updated each 
week).

On 1st February (I don't know whether the date is significant) my daily 
health plot suddenly lost its R/H axis.  I didn't do nuffink...

Well, there was a MacPorts update that morning, but I didn't see Gnuplot 
in the list; I guess it's possible that something got borked, but just the 
R/H axis?  Gnuplot was last updated on 25th Jan, and worked up until now.

As it was on 31st Jan: http://www.horsfall.org/health.pdf.old (no HTTPS 
yet).

Now: http://www.horsfall.org/health.pdf

Well, all I did was to add an entry for 1st Feb:

     # Date	Time	Wgt	Gth	Sys	Dia	HR

     30/1/21	1800	89.9	109	115	72	77
     31/1/21	1730	88.6	109	118	72	95
==> 1/2/21	1830	88.6	109	115	67	82
     2/2/21	1730	90.3	109	118	60	69

The error:

     gnuplot> load 'health.gp'
 	     "health.gp" line 99: warning: y2 axis range undefined or overflow

Note that line 99 is actually the last continued line of the "plot" 
command, which I certainly had not changed:

     mackie:health dave$ ls -l *.gp
     -rw-r--r--  1 dave  staff  5511 Sep 27  2019 health.gp

(Note that the one I attached has potentially sensitive comments removed; 
it's my personal information, after all, but I'm willing to share the lot 
with an individual, not the entire list.)

It's worth noting that the plot has probably saved my life a few times, as 
I suffer from hypertension (with medication)...

The script itself is attached (I trust that it's within the guidelines).

Thanks.

-- Dave

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health.gp (text/plain, 2.7 KB)
#
# Daily elf-check readings for weight/BP etc
#

reset		# I may have been stuffing around interactively

set title "Dave's Daily Health Checks"

#
# Futz around with the legend a bit.
#
set key		reverse Left
set key		box outside
set key		below

set terminal aqua title "health"	# Why can't I just say "+title"?

#
# BMI stuff (kg/m^2).
#
#height = 182	# A bit over 6ft - must check
height = 180	# I seem to have shrunk?  Damn!
bmi(weight) = weight/((height/100.0)**2)

#
# Basal metabolic rate (BMR).  For men, the BMR was 66 + (13.7xW) +
# (5xH) – (6.8 x A).  W is the person’s weight in kilograms, H is the
# person’s height in centimeters, and A is the person’s age in years.
# It's changed a bit...  Anyway, it's kcal(Cal)/day.  NB: males only.
#
# Consider using kilojoules instead (a MJ is 239kcal).
#
year = `date +%Y`	# Tiny chance of wrap-around here; not worth fixing
month = `date +%-m`	# Rampant octal brain-death...
age = int(year - 1952 + (month-10)/12.0 + 0.5)	# XXX Wraps around in Jan! Need + 12 mod 12
bmr1(weight) = ((13.7*weight) + (5.0*height) - (6.8*age) + 66)	# Orig H-B
bmr2(weight) = ((13.4*weight) + (4.8*height) - (5.7*age) + 88)	# Rev H-B
# This one is now in vogue; all pretty much the same anyway...
bmr3(weight) = ((10.0*weight) + (6.3*height) - (5.0*age) + 5)	# M StJ

#
# Funcs not defined but ought to be.
#
avg(a, b) = (a + b)/2.0		# Pedantically "arithmetic mean"...

#
# Useful macros.
#
WEIGHT	= "$3"
GIRTH	= "$4"
SYS	= "$5"
DIA	= "$6"
HR	= "$7"

### XXX set datafile missing "x"
set style data lines		# NB: needs to be explicit with user funcs

set xdata	time
set timefmt	"%d/%m/%y"
set xtics format "%d %b\n%Y"

set xtics	nomirror

# XXX Need to get colours right

set ytics add	("(HR max) 100" 100)
set ytics add	("(HR min) 60" 60)
set ytics add	("(BMI max) 30" 30)
set ytics add	("(BMI min) 20" 20)

set y2tics add	("140 (Sys max)" 140)
set y2tics add	("100 (Sys min)" 100)
set y2tics add	("90 (Dia max)" 90)
set y2tics add	("60 (Dia min)" 60)

set yrange	[0:160]

set grid	# XXX And don't draw extra grid line

datafile	= "health.dat"

#
# There is no correlation with time, but BP & HR is interesting.
#

#
# Legend jiggered to correspond with plots.
#

plot \
    datafile using 1:(@SYS)	lt rgb "red" title 'Systolic', \
    datafile using 1:(@DIA)	lt rgb "red" title 'Diastolic', \
    datafile using 1:(@HR) with lines	lt rgb "green"	title 'Heart', \
    datafile using 1:(@WEIGHT)	with lines lt rgb "cyan" title 'Weight', \
    datafile using 1:(bmi(@WEIGHT)) \
	with lines lt 13 title 'BMI (kg/m^2)', \
    datafile using 1:(bmr3(@WEIGHT))/100.0 \
	with lines lt 3 title 'BMR/100 (Cal/day)', \
    0 lt -1 notitle	# Dummy so I can move above around
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